HIOKI IR4057 Insulation Tester
Quick Response Comparator Offering Reading Stability in High-speed Digital Format
Discontinued >
HIOKI IR4057-50 Insulation Tester
OVERVIEW
Hioki insulation testers or megohmmeters feature all-in-one designs including built-in rugged cases and test lead storage compartments. The IR4057 is a 5-range, 50 V to 1000 V digital insulation resistance tester with bargraph, and delivers efficient functions and features to help shorten work time associated with field insulation testing.
CAT III 600 V
Key Features
Model No. (Order Code)
| IR4057-20 |
Insulation Tester, Discontinued, High-speed model |
FEATURES
How to Use Digital Insulation Resistance Meters - Basic Course
This video explains how to use a digital insulation resistance tester to measure a distribution panel.
Shooting was done with Japanese model IR4052. The global model name is IR4057.
Comparator function provides PASS/ FAIL decisions at a glance
Compare measured values to pre-set reference values to generate a pass or fail judgment with the Comparator function.
(also pair with insulation resistance measurement and low-resistance measurement)
The insulation testers give you pass/ fail results using a beeping sound, LCD light, and indication right on the test lead with remote control switch (option), letting you check for insulation integrity without needing to look at the instrument.
Robust, damage-resistant design
These instruments feature a robust design that can withstand being dropped onto concrete from a height of 1 m.
Difficult to damage, this insulation tester is ideal for use in the field.
White LED lighting that’s easy to read in dim locations in the field
The scale is lit by a white LED, ensuring that insulation resistance values are easy to read, even when using the instrument in a dim location.
Measurement switch designed for outstanding ease of use
The instrument’s measurement switch can be operated with just the thumb.
Press for a single measurement or lift up for continuous measurement of insulation resistance.
200 mA grounding line continuity check function
The Insulation testers can perform EV and HEV continuity checks as well as resistance measurement of safety conductors in building electrical equipment as defined by IEC 60364.
SPECIFICATIONS
Basic specifications
Accuracy guaranteed: 1 year
| Rated output voltage |
50 V DC |
125 V DC |
250 V DC |
500 V DC |
1000 V DC |
| Effective maximum indicated value |
100 MΩ |
250 MΩ |
500 MΩ |
2000 MΩ |
4000 MΩ |
Accuracy
1st effective measuring range MΩ |
±2 % rdg. ±2 dgt.
0.200 - 10.00 |
±2 % rdg. ±2 dgt.
0.200 - 25.0 |
±2 % rdg. ±2 dgt.
0.200 - 50.0 |
±2 % rdg. ±2 dgt.
0.200 - 500 |
±2 % rdg. ±2 dgt.
0.200 - 1000 |
| Lower limit resistance |
0.05 MΩ |
0.125 MΩ |
0.25 MΩ |
0.5 MΩ |
1 MΩ |
| Overload protection |
600 V AC (10s) |
660 V AC (10s) |
| DC voltage range |
4.2 V (0.001 V resolution) to 600 V (1 V resolution), 4 ranges,
Accuracy: ±1.3% rdg. ±4 dgt., Input resistance: 100 kΩ or higher |
| AC voltage range |
420 V (0.1 V resolution) / 600 V (1 V resolution), 2 ranges, 50/60 Hz,
Accuracy: ±2.3% rdg. ±8 dgt., Input resistance: 100 kΩ or higher, Average rectifier |
| Low resistance range |
For checking the continuity of ground wiring, 10 Ω (0.01 Ω resolution) to 1000 Ω (1 Ω resolution), 3 ranges, Basic accuracy: ±3 % rdg. ±2 dgt., testing current 200 mA or more (at 6 Ω or less) |
| Display |
Semi-transmissive FSTN LCD with back lighting, bar-graph indicator |
| Response time |
Approx. 0.3 second for PASS/FAIL decision (based on in-house testing) |
| Other functions |
Indicate MΩ measurement value after a lapse of one minute, Live circuit indicator, Automatic electric discharge, Automatic DC/AC detection, Comparator, Drop proof, Auto power save |
| Power supply |
LR6 (AA) alkaline batteries × 4, Continuous use: 20 hours (based on in-house testing)
Number of measurements: 1000 times (at 5 s ON, 25 s OFF cycle, insulation measurement of lower limit resistance value to maintain nominal output voltage) |
| Dimensions and mass |
159 mm (6.26 in) W × 177 mm (6.97 in) H× 53 mm (2.09 in) D, 640 g (22.6 oz) (including batteries, excluding test leads) |
| Included accessories |
Test Lead L9787 ×1, Neck strap ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×4 |
